jquery's Operations large collection of SELECT

This article mainly introduces jquery to select the operation of a detailed summary, the need for friends can come to the reference, I hope to help you

1.jQuery Add/Remove option for select: 2.$ ("#select_id"). Append ("<option value= ' value ' >text</   Option> ");   Appends an option (Drop-down) 3.$ ("#select_id") to the Select. Prepend ("<option value= ' 0 ' > Please select </option>");   Inserts an option (first position) 4.$ ("#select_id option:last") for the Select. Remove ();   Deletes the maximum index value option (the last) 5.$ ("#select_id option[index= ' 0 ')" in the Select. Remove ();   Deletes the option (first) 6.$ ("#select_id option[value= ' 3") with an index value of 0 in the Select. Remove ();   Deletes option 7.$ ("#select_id option[text= ']" of value= ' 3 in the Select). Remove (); Deletes the option 8.$ ("#select_id") of text= ' 4 in the Select. Empty (); Empty option 1.jQuery in Select to get the text and value selected by select: 2.$ ("#select_id"). Change (function () {//code ...});    //adds an event for a select that triggers   3.var checktext=$ ("#select_id") when one of the items is selected. Find ("option:selected"). Text ();  //Get Select text   4.var checkvalue=$ ("#select_id"). Val ();  //Gets the value   5.var checkindex=$ ("#select_id") of select selected. Get (0). SelectedIndex;  //Get the index value of select selected   6.var maxindex=$ ("#select_id option:last"). attr ("index");  //Get Select Maximum index value jquery set Select selected text and value: